count primitive | NetLogo Dictionary

count

Count returns the number of agents in a specified agentset, where agentset can be turtles, patches, links, etc. (See with to narrow down a given agentset.) For example, show count turtles would show the total number of turtles in a model, and show count turtles with [color = green] would show the number of green turtles in the model.

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Limited Editing

breed [balls ball]
breed [players player]

to setup
  clear-all
  setup-court
  create-balls 1 [set shape "ball basketball" set color orange set size 2]
  create-players random 20 [
    set shape "person"
    set color blue
    set size 3
    setxy random-xcor random-ycor]
  reset-ticks
end

to can-we-play?
  ; if there are less than 10 players or an odd amount of players, they can't play
  ifelse count players < 10
      [ ask players [
        set shape "face sad"
        set label "not enough players!"
        set label-color red] ]
      [ ask players [
        set shape "face happy"
        set label "enough players!"
        set label-color red]]
  tick
end

; set label for sad/happy

to setup-court
  ask patches [set pcolor brown]
  ask patch 0 0 [
    ask patches in-radius 4 [
      set pcolor white
    ]
    ask patches in-radius 3 [
      set pcolor brown
    ]
  ]
  ask patches with [abs pxcor = max-pxcor  or
                    abs pycor = max-pycor  or
                    pycor = 0 ] [
    set pcolor white
  ]
end

Limited Editing

Error

NetLogo Web has encountered a problem.

It looks like you're using NetLogo Web in standalone mode.
If the above error is being caused by an unimplemented primitive, we recommend a quick visit to NetLogoWeb.org to see if the primitive has been implemented in the most up-to-date version.

What's next?

Once you mastered the count primitive, don't stop there. Check out the resources below to improve your NetLogo skills.

count

Try it Yourself

Error

What's next?

Published NetLogo models that use the `count` primitive:

Wolf Sheep Predation

Similar primitives:

`mean`

`mod`

`if`

`if-else`

Learn another primitive

count

Try it Yourself

Error

What's next?

Published NetLogo models that use the count primitive:

Wolf Sheep Predation

Similar primitives:

mean

mod

if

if-else

Learn another primitive

Published NetLogo models that use the `count` primitive:

`mean`

`mod`

`if`

`if-else`